Outlook Mail attempts to sync entire account

[nerdstrap]

this seems to happen once or twice a week - my phone will try to sync the entire contents of my Yahoo inbox instead of what the settings say to do (past 3 days)

my phone crawls to a halt since the entire storage is taken up..

ive seen others with this problem too, but no one has uncovered the cause???

a few soft resets and clearing the mail account solve the issue, but it is a HUGE pain - just getting to the mail app to clear it sometimes 3/4 resets!

does anyone know why this is happening and what can be done to prevent it?